I may or may not know a business owner who got criminals off their business' street by saying he thinks he saw a gun any time criminals showed up to do things, everything from prostitution to selling drugs. Cops showed up immediately. They stopped coming by altogether, probably the safest street in quite a rough part of town.

It's crazy how cops just rush to very specific and nuanced crimes. Someone likely said they heard gun shots, and then they scrambled to find them.